Luminol is a chemical that forensic scientists use to find traces of blood at crime scenes. Before application, a crime scene investigator will assemble the solution by combining luminol, sodium hydroxide, and hydrogen peroxide. The sodium hydroxide and hydrogen peroxide are what initially sets off the chemical reaction with the luminol. Then the investigator sprays it over the crime scene. If there is any blood present, the iron in it will act as a catalyst in the chemical reaction. This specific sort of chemical reaction is known as chemiluminescence, which is basically the emitted light caused by a chemical reaction, which doesn’t result in significant heat. The amount of catalyst needed to actually conduct the reaction is minimal, in